Travel, especially during the holiday season, can be stressful. But following some tips from the pros as you prepare for a trip can make for a smoother, less anxious experience. One expert traveler suggests making a list a week before you go of things you need to do and pack. Cross off each item as you complete it during the week. Another tip: Carry your comfort zone with you. That could mean noise-cancelling headphones, playlists meant to soothe airport travelers, entertainment and snacks from home. Carry a change of clothes and a phone charger in case of delays. Stay hydrated. Leave extra time. And know your airline's rules. Downloading the airline's app can help with that.